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Wu Y, Zhou W, Lu Z, et al. A Spelling Paradigm With an Added Red Dot Improved the P300 Speller System Performance. Front Neuroinform. 2020;14:589169doi: 10.3389/fninf.2020.589169.
Wu, Y., Zhou, W., Lu, Z., & Li, Q. (2020). A Spelling Paradigm With an Added Red Dot Improved the P300 Speller System Performance. Frontiers in neuroinformatics, 14589169. https://doi.org/10.3389/fninf.2020.589169
Wu, Yan, et al. "A Spelling Paradigm With an Added Red Dot Improved the P300 Speller System Performance." Frontiers in neuroinformatics vol. 14 (2020): 589169. doi: https://doi.org/10.3389/fninf.2020.589169
Wu Y, Zhou W, Lu Z, Li Q. A Spelling Paradigm With an Added Red Dot Improved the P300 Speller System Performance. Front Neuroinform. 2020 Dec 03;14:589169. doi: 10.3389/fninf.2020.589169. eCollection 2020. PMID: 33343323; PMCID: PMC7744603.
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Front Neuroinform. 2020 Dec 03;14:589169. doi: 10.3389/fninf.2020.589169. eCollection 2020.

A Spelling Paradigm With an Added Red Dot Improved the P300 Speller System Performance.

Frontiers in neuroinformatics

Yan Wu, Weiwei Zhou, Zhaohua Lu, Qi Li

Affiliations

  1. School of Computer Science and Technology, Changchun University of Science and Technology, Changchun, China.

PMID: 33343323 PMCID: PMC7744603 DOI: 10.3389/fninf.2020.589169

Abstract

The traditional P300 speller system uses the flashing row or column spelling paradigm. However, the classification accuracy and information transfer rate of the P300 speller are not adequate for real-world application. To improve the performance of the P300 speller, we devised a new spelling paradigm in which the flashing row or column of a virtual character matrix is covered by a translucent green circle with a red dot in either the upper or lower half (GC-RD spelling paradigm). We compared the event-related potential (ERP) waveforms with a control paradigm (GC spelling paradigm), in which the flashing row or column of a virtual character matrix was covered by a translucent green circle only. Our experimental results showed that the amplitude of P3a at the parietal area and P3b at the frontal-central-parietal areas evoked by the GC-RD paradigm were significantly greater than those induced by the GC paradigm. Higher classification accuracy and information transmission rates were also obtained in the GC-RD system. Our results indicated that the added red dots increased attention and visuospatial information, resulting in an amplitude increase in both P3a and P3b, thereby improving the performance of the P300 speller system.

Copyright © 2020 Wu, Zhou, Lu and Li.

Keywords: P300 speller; brain-computer interface (BCI); event-related potential; spelling paradigm; visuospatial information

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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